Hexaferrite Permanent Magnetic Materials
Sami H. Mahmood ยท Ibrahim Abu-Aljarayesh
แแฅแข. 2016 ยท Materials Research Forum LLC
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This concise book presents the basic concepts of magnetism and magnetic properties pertinent to permanent magnetic materials. Emphasis is placed on hexaferrite materials for permanent magnet applications, with M-type ferrites as the focal point.ย
The relatively high metallicity of magnetic materials for practical applications imposes limitations for their efficient use. Accordingly, magnetic oxides with ferromagnetic properties emerged as the most widely used magnetic materials for practical applications, owing to their characteristic high resistivity and low eddy current losses, chemical stability, simplicity of production in mass quantities, and other favorable characteristics. An important class of these oxides is the class of hexagonal ferrites developed in the early 1950โs, which dominated the world market of permanent magnet applications since the end of the 1980โs. Among these ferrites, the magnetoplumbite (M-type) hexaferrite, is produced nowadays in large quantities at very competitive low prices, thus providing the permanent magnet market with probably the most cost-effective magnetic material.ย
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Currently, Professor Sami Mahmood is professor of Physics at the University of Jordan, Amman. He obtained his B.Sc. in Physics from The University of Jordan, Amman in 1978, and Ph.D in Physics from Michigan State University, East Lansing, Michigan in 1986. He assumed several administrative positions at different Jordanian Universities such as Director of the Center for Theoretical and Applied Physical Sciences (1992-1994), Chairman of Physics (1996-1998), Dean of Science (1998-2004), Dean of Scientific research and Graduate Studies (2007-2009), Director of the Center of Accreditation and Quality Assurance, and Vice President (2004-2005). He has obtained several national, regional and international Awards and Honors for Academic excellence and contribution to science. To date he has published over 100 articles in peer reviewed journals and conference proceedings. Other academic and scientific activities included membership in the editorial boards of several national and international research journals, participation and management of nationally and internationally funded projects concerned with the establishment of new academic programs, capacity building, and program development, in addition to his active participation in scientific committees and councils of Scientific Research Funds in Jordan, and organization of national and international conferences.
Professor Ibrahim Abu Aljarayesh joined Yarmouk University in 1987 and became Professor of solid state physics in 1997-current. He optained his B.Sc. in Physics at the University of Jordan, Amman, in 1977 and his M.Sc. in Solid State Physics at the University of Jordan in 1980. He received his Ph.D. in Solid State Physics from University of Illinois in Chicago in 1986. During 2006-2012 he was Editor-in-Chief for the Jordan Journal of Physics. His research interest are: dynamics as well as statics of phase transitions especially in magnetic materials. He has published over 50 research articles in the field of magnetism and related materials.
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